Упрочнение быстроизнашивающихся сменных деталей сельскохозяйственных машин импульсной закалкой

Abstract

В статье приведены технологические аспекты упрочнения деталей из сталей пониженной прокаливаемости (55ПП, 60ПП), с применением импульсной закалки. Показано, что технология импульсной закалки позволяет формировать мелкозернистую структуру, являющейся основой повышения конструкционной прочности и износостойкости деталей.

The article presents the technological aspects of the hardening of low-hardenability steels (55PP, 60PP) using pulsed quenching. It is shown that pulse quenching technique allows forming a fine grain structure. It is established that during the intensive cooling liquid quenching workpieces of steels PP products formed therein martensite nanometer size (20 - 80 nm). Giving such a dispersed structure is the basis of the structural increase structural strength and durability. Technology quenching pulse formation is achieved in flat products volume nanocomposite state. It is characterized, firstly, the presence of dissipative structural framework in a transverse section of the product, and secondly, submelkokristallicheskim grain martensite. It is established that during the intensive cooling liquid quenching workpieces of steels PP products are formed martensite nanometer size (20 - 80 nm). Giving such a dispersed structure of the structure is the basis of the strength and durability. Technology pulse hardening has high performance, cost-effective and adapted to the production conditions of hardening of replacement parts of agricultural machinery. machinery.